Incinerator grate



June 24, 1930. J. c. WOODMAN INCINERATOR GRATE Filed 0012.15, 1924 IINVENTOR. 6. WW/MM Y 9 i [6 ORNEYS.

Patented June 24, 1930 warren STATES PATENT OFFICE JOSEPH C. WOODMAN, OFBROOKLYN, NEW YORK, ASSIGNOR TO DECARIEINGINERATOR CORPORATION, OF NEWYORK, N. Y., A CORPORATION OF NEW YORK INOINERATOR GRATE Applicationfi1ed October 13, 1924. Serial No. 743,279.

This invention relates to grates for incinerators and may be applied tothose types which are provided with water-cooled baskets orbasket-grates in which the material of the fresh charges is dried andpartially consumed before it falls on lower shaking grates where it isfinally consumed to a clear ash or clinker.

The principal object of the invention is to re provide an improved gratestructure.

The particular nature of the invention as well as other objects andadvantages thereof will appear most clearly from a description of apreferred embodiment as shown in the '15 accompanying drawings, in whichFig. 1 is a top plan view of the grates;

Fig. 2 is a sectional front elevation of the grates; and

Fig. 3 is a detail ofthe grate-operating 2o mechanism.

Referring to the drawings the grate system is shown associated withmember 55 which serves to support the incinerator or other furnacestructure. The incinerator 2 shown is of the jacketed wall type havingjackets formed in its external walls. Member 55 and the associated gratesystem are shown as disposed over an opening leading to the usualashpit. Referring particularly to Figures 1 and 2, the grate system asshown is made up of a plurality of grates 19, each formed of eightsections secured on a. squared shaft 36 by bolts 37 passing throughflanges 38 at the bases of the sections 35 and through flanges 39 ofclamping pieces 40. These shafts 36 are arranged in pairs and arejournalled in bearings 52, as shown in Figs. 1 and 3, which bearings areat the sides of the ash-pit. Alternate shafts are provided at oppositeends with worm gears 41 meshing with worms 42 journalled in brackets 43projecting from the sides of the ash-pits. The worms 42 may be turned orrocked manually by the use of suitable implements and serve to lock thegrates in any position to which they may be shifted.

The bearings 52 may be single, as shown, and are detachably mounted onthe upper horizontal flanges 53 of end and intermediate supportingmembers 54 that are distributed in parallel rows along opposite sides ofa metallic base 55 that is open at the top and bottom, as illustrated inthe different figures of the drawings. As shown to advantage in Figs. 1and 2, each shaft 36 is mounted at its opposite ends in a pair ofbearings 52, the shafts being arranged in a plurality of pairspositioned above the supporting members 54. Also, as clearly shown inthese figures, the shafts 36 of each pair of shafts are widely spacedapart, and the contiguous shafts of adjacent pairs are in proximity toeach other. As readily discernible in Figs. 1 and 2, each pair ofcorrelated shafts carry a plurality of associated grate elements, whichoverhang the opposite sides of the shafts that carry them to differentextents.

WVhile the' bearings 52 are mounted on horizontal faces of thesupporting members supporting members 54 and extend beyond the verticalfaces thereof.

The hereinbefore described operating means for the grate-carrying shafts36, which include the worms 42 that are mounted in the brackets 43, aswell as the worm gears 41 that are mounted on the shafts 36, areoperable to turn or rock the shafts to move their grate elements intoupper positions, thus substantially closing the upper opening of thebase frame 55, as well shown in Figs. 1 and 2. Otherwise actuated, theoperating means is also capable of swinging the grate elements downwardthrough the bottom opening of the base frame into a dumping position, asalso shown in Figs. 1 and 2. j

Reference to Figs. 1 and 2 discloses that the peculiar clamping portionsof the sections 35 of the grates 19 are formed to it any part of theshaft they are mounted on,

tion, greatly minimizing the amount of repair work, if any should becomenecessary.

As shown on a larger scale in Figs. 1 and 3, stationary grates 35parallel opposite sides of the base frame 55 and rest on seats 52 withwhich the bearings 52 are provided. As seen in Fig. 3, the seats 52' areprovided with upwardly projecting ribs or lugs 52" that hold thestationary grates 35 from lateral displacement. In Fig. 1 it is seenthat the other grate elements 35 that are mounted on the shafts 36 toturn therewith extend between opposed bearings 52, as well as betweenthe stationary grates 35 on opposite sides of the base 55. Thestationary grates 35' extend from one to another of the supportingmembers 54, as best shown in Fig. 1.

As shown at the right in Figs. 1 and 2, the grate sections are so shapedthat when the grates 19 are in operative position the space over theash-pit 23 is closed so thoroughly as to permit only the finest ashes topass to the ash-pit, and that, when the grates are turned downwardly asindicated at the left in Figs. 1 and 2, the dumping will be complete.The main portion of each section 35 extends to one side of thecorresponding shaft 36 but each section is also provided with a heelprojecting in the opposite direction to such an extent as to assurecomplete dumping between adjacent grates and also at the ends of thegrate area. Such grate structure is also particularly advantageousbecause of its action in breaking up the clinker.

It will be understood that variations may be resorted to within thescope of the invention and portions of the improvement may be usedwithout others.

I claim 1. In a grate system, a metallic base frame open at the top andbottom, supporting members correspondingly distributed along oppositesides of said frame and provided with upper horizontal flanges, bearingsdetachably mounted on said flanges, a plurality of pairs of shafts eachmounted in a pair of said bearings the shafts of each pair of shaftsbeing relatively widely spaced apart and the contiguous shafts ofadjacent pairs being in proximity to each other, a plurality of grateelements carried by each shaft, said elements overhanging the oppositesides of the shafts that carry them to a different extent and operatingmeans adapted to turn said shafts to move the grate elements into upperpositions substantially closing the upper opening of the frame and toswing said grate elements downward through the bottom frame opening intoadumping position.

2. In a grate system, a plurality of parallel shafts, supporting membersunder opposite ends of-said shafts provided with upper horizontalflanges, bearings secured to said flanges pivotally mounting theopposite ends of said shafts and provided with seats on their upperexternal portions, stationary grates mounted on said seats extendingtransversely of the axes of said shafts, grate elements mounted on saidshafts to turn therewith between said stationary grates, and meansconnected to said shafts to turn the same.

3. In a grate system, a plurality of end and intermediate supportingmembers in parallel rows, single detachable bearings mounted on said endmembers and pairs of detachable bearings mounted on the intermediatemembers, said bearings being pro vided with seats on their upperexternal portions, stationary grates extending over and from one toanother of said supporting members and being mounted on said seats,rockable shafts above and extending from one to the other of theparallel rows of said supporting members and being journalled at theiropposite ends in said bearings, grate elements mounted on said shafts,and means to rock said shafts.

In testimony whereof I aflix my signature.

JOSEPH G. VVOODMAN.

